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Home > Archive > Macromedia Flash Server > November 2005 > flv seeking via PHP
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| Author |
flv seeking via PHP
|
|
| András Csizmadia 2005-11-02, 5:45 pm |
| Hi, here is some php download class (thanks for the author: Nguyen Quoc
Bao), maybe its usefull with some upgrade and it's a good demo for php file
handling.
cheers,Andrew
<?
/*------------------
| Download Handler |
------------------*/
/*
@author Nguyen Quoc Bao <quocbao.coder-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
visit http://en.vietapi.com/wiki/index.php/PHP:_HttpDownload for class
information
Please send me an email if you find some bug or it doesn't work with
download manager.
I've tested it with
- Reget : http://reget.com
- FDM : http://freefiledownloadmanager.org
@version 1.2
@desc A simple object for processing download operation , support section
downloading
@distribution It's free as long as you keep this header .
@sample
1: File Download
$object = new httpdownload;
$object->set_byfile($filename); //Download from a file
$object->use_resume = true; //Enable Resume Mode
$object->download(); //Download File
2: Data Download
$object = new httpdownload;
$object->set_bydata($data); //Download from php data
$object->use_resume = true; //Enable Resume Mode
$object->set_filename($filename); //Set download name
$object->set_mime($mime); //File MIME (Default: application/otect-stream)
$object->download(); //Download File
3: Manual Download
$object = new httpdownload;
$object->set_filename($filename);
$object->download_ex($size);
//output your data here , remember to use $this->seek_start and
$this->seek_end value 
*/
class httpdownload {
/*----------------
| Class Variable |
----------------*/
/**
$handler : Object Handler
$use_resume : use section download
$use_autoexit : auto stop after finishing download
$use_auth : use authentication download
$data : Download Data
$data_len : Download Data Len
$data_type : Download Data Type
$data_mod : Last modified time
$filename : Download File Name
$mime : File mime
$bufsize : BUFFER SIZE
$seek_start : Start Seek
$seek_end : End Seek
**/
var $handler = array('auth' => false ,'header' =>
false,'fopen'=>false,'fclose'=>false,'fread'=>false,'fseek' => false);
var $use_resume = true;
var $use_autoexit = true;
var $use_auth = false;
var $data = null;
var $data_len = 0;
var $data_mod = 0;
var $filename = null;
var $mime = null;
var $bufsize = 2048;
var $seek_start = 0;
var $seek_end = -1;
/*-------------------
| Download Function |
-------------------*/
/**
pre_download() : Pre Download Function
download() : Download all file
set_byfile() : Set data download by file
set_bydata() : Set data download by data
set_byurl() : Set data download by url
set_filename() : Set file name
set_mime() : Set file mime
download_header() : Send header
download_ex() : Manual Download
**/
function pre_download() {
global $HTTP_SERVER_VARS;
if ($this->use_auth) { //use authentication
if (!$this->_auth()) { //no authentication
$this->_header('WWW-Authenticate: Basic realm="Please enter your
username and password"');
$this->_header('HTTP/1.0 401 Unauthorized');
$this->_header('status: 401 Unauthorized');
if ($this->use_autoexit) exit();
return false;
}
}
if ($this->mime == null) $this->mime = "application/octet-stream";
//default mime
if (isset($_SERVER['HTTP_RANGE']) ||
isset($HTTP_SERVER_VARS['HTTP_RANGE'])) {
if (isset($HTTP_SERVER_VARS['HTTP_RANGE'])) $seek_range =
substr($HTTP_SERVER_VARS['HTTP_RANGE'] , strlen('bytes='));
else $seek_range = substr($_SERVER['HTTP_RANGE'] , strlen('bytes='));
$range = explode('-',$seek_range);
if ($range[0] > 0) {
$this->seek_start = intval($range[0]);
}
if ($range[1] > 0) $this->seek_end = intval($range[1]);
else $this->seek_end = -1;
} else {
$this->seek_start = 0;
$this->seek_end = -1;
}
if ($this->seek_start < 0 || !$this->use_resume) $this->seek_start = 0;
return true;
}
function download_ex($size) {
if (!$this->pre_download()) return false;
ignore_user_abort(true);
//Use seek end here
if ($this->seek_start > ($size - 1)) $this->seek_start = 0;
if ($this->seek_end <= 0) $this->seek_end = $size - 1;
$this->download_header($size,$seek,$this->seek_end);
$this->data_mod = time();
return true;
}
function download() {
if (!$this->pre_download()) return false;
$seek = $this->seek_start;
ignore_user_abort(true);
@set_time_limit(0);
$size = $this->data_len;
if ($this->data_type == 0) {
$size = filesize($this->data);
if ($seek > ($size - 1)) $seek = 0;
if ($this->filename == null) $this->filename = basename($this->data);
$res =& $this->_fopen($this->data,'rb');
if ($seek) $this->_fseek($res , $seek);
if ($this->seek_end < $seek) $this->seek_end = $size - 1;
$this->download_header($size,$seek,$this->seek_end); //always use the
last seek
$size = $this->seek_end - $seek + 1;
while (!connection_aborted() && $size > 0) {
if ($size < $this->bufsize) echo $this->_fread($res , $size);
else echo $this->_fread($res , $this->bufsize);
$size -= $this->bufsize;
}
$this->_fclose($res);
} else if ($this->data_type == 1) {
if ($seek > ($size - 1)) $seek = 0;
if ($this->seek_end < $seek) $this->seek_end = $this->data_len - 1;
$this->data = substr($this->data , $seek , $this->seek_end - $seek + 1);
if ($this->filename == null) $this->filename = time();
$size = strlen($this->data);
$this->download_header($this->data_len,$seek,$this->seek_end);
while (!connection_aborted() && $size > 0) {
echo substr($this->data , 0 , $this->bufsize);
$this->data = substr($this->data , $this->bufsize);
$size -= $this->bufsize;
}
} else if ($this->data_type == 2) {
//just send a redirect header
header('location : ' . $this->data);
}
if ($this->use_autoexit) exit();
return true;
}
function download_header($size,$seek_start=null,$
seek_end=null) {
$this->_header('Content-type: ' . $this->mime);
$this->_header('Content-Disposition: attachment; filename="' .
$this->filename . '"');
$this->_header('Last-Modified: ' . date('D, d M Y H:i:s \G\M\T' ,
$this->data_mod));
if ($seek_start && $this->use_resume) {
$this->_header("Content-Length: " . ($seek_end - $seek_start + 1));
$this->_header('Accept-Ranges: bytes');
$this->_header("HTTP/1.0 206 Partial Content");
$this->_header("status: 206 Partial Content");
$this->_header("Content-Range: bytes $seek_start-$seek_end/$size");
} else {
$this->_header("Content-Length: $size");
}
}
function set_byfile($dir) {
if (is_readable($dir) && is_file($dir)) {
$this->data_len = 0;
$this->data = $dir;
$this->data_type = 0;
$this->data_mod = filemtime($dir);
return true;
} else return false;
}
function set_bydata($data) {
if ($data == '') return false;
$this->data = $data;
$this->data_len = strlen($data);
$this->data_type = 1;
$this->data_mod = time();
return true;
}
function set_byurl($data) {
$this->data = $data;
$this->data_len = 0;
$this->data_type = 2;
return true;
}
function set_filename($filename) {
$this->filename = $filename;
}
function set_mime($mime) {
$this->mime = $mime;
}
function set_lastmodtime($time) {
$time = intval($time);
if ($time <= 0) $time = time();
$this->data_mod = $time;
}
/*----------------
| Other Function |
----------------*/
/**
header() : Send HTTP Header
**/
function _header($var) {
if ($this->handler['header']) return
@call_user_func($this->handler['header'],$var);
else return header($var);
}
function &_fopen($file,$mode) {
if ($this->handler['fopen']) return
@call_user_func($this->handler['fopen'],$file,$mode);
else return fopen($file,$mode);
}
function _fclose($res) {
if ($this->handler['fclose']) return
@call_user_func($this->handler['fclose'],$res);
else return fclose($res);
}
function _fseek($res,$len) {
if ($this->handler['fseek']) return
@call_user_func($this->handler['fseek'],$res,$len);
else return fseek($res,$len);
}
function &_fread($file,$size) {
if ($this->handler['fread']) return
@call_user_func($this->handler['fread'],$file,$size);
else return fread($file,$size);
}
function _auth() {
if (!isset($_SERVER['PHP_AUTH_USER'])) return false;
if ($this->handler['auth']) return
@call_user_func($this->handler['auth'],$_SERVER['PHP_AUTH_USER'],$_SERVER['P
HP_AUTH_PW']);
else return true; //you must use a handler
}
}
?>
--
No virus found in this outgoing message.
Andras Csizmadia | cs.andras-J+jpbPhcmEAHWmgEVkV9KA@public.gmane.org | www.vpmedia.hu - www.csizmadiaandras.hu
Checked by AVG Free Edition.
Version: 7.1.362 / Virus Database: 267.12.6/152 - Release Date: 2005.10.31.
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| |
| Naicu Octavian 2005-11-02, 5:45 pm |
| Hehe, I have found the flv in the browsers cache!
It only caches the flv when you seek, and because the
php script also sends a header, the flv from the cache
is as good as any other flv!
Use=20
header("Cache-Control: no-store, no-cache,
must-revalidate");=20
in the php script to avoid the caching.
--- Stefan Richter <stefan-fMeCE+ULXElEfu+5ix1nRw@public.gmane.org> wrote:
> All my progress is now published here:
> http://www.flashcomguru.com/
>=20
> First article.
>=20
> Stefan
>=20
>=20
> -----------------------------------
> Flashcomguru.com
> Team Macromedia Flash
>=20
> =20
>=20
> [mailto:flashcomm-
> Octavian
> theoretically is possible
> the FLVMDI that inserts in
> starting position in bytes
> can ask the php to
> begininning of a keyframe.
> server, because it does
> seek the position we
> currently only available
> <king.selassie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> in red5. Basically
> whatever they are called.
> or data, a size and
> forward passed the
> instead of to x number of
> the playback. I
> from other frames,
> quite basic but the
> used to help with the
> the rtmp stuff in red5
> using the concept
> always a good thing.
> thread with a new name and
> discussed here in the last
> sources and my
> thread... I forgot before I
> [mailto:flashcomm-
> Fabio Sonnati
> available for download
> available for download
> file.
> time/positions:
> Math.floor((loader.scrub._x/loaderwidth)*duration);
> tofind ) ){
>
ns.play("flvprovider.php?file=3Dclip_yes.flv&position=3D"
> + positions[i]);
> flashcomm-bounces-1Ss2GqJETD3yZ38Mhd3e/9ZfFG6BLHNm@public.gmane.org
> [mailto:flashcomm-
> Stefan Richter
> beta available for
> this.
> it does not appear to
> seconds or so and does not
> configuration issue with
>=20
=3D=3D=3D message truncated =3D=3D=3D
=09
=09
__________________________________=20
Yahoo! Mail - PC Magazine Editors' Choice 2005=20
http://mail.yahoo.com
=3D-----------------------------------------------------------
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=3D-----------------------------------------------------------
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| |
| Stefan Richter 2005-11-02, 5:45 pm |
| Thanks but I don't really care if it's cached or not :-)
The flv sits inside a web accessible directory anyway.
> -----Original Message-----
> From: flashcomm-bounces-1Ss2GqJETD3yZ38Mhd3e/9ZfFG6BLHNm@public.gmane.org [mailto:flashcomm-
> bounces-1Ss2GqJETD3yZ38Mhd3e/9ZfFG6BLHNm@public.gmane.org] On Behalf Of Naicu Octavian
> Sent: 02 November 2005 15:35
> To: FlashComm Mailing List
> Subject: RE: [FlashComm] RE: flv seeking via PHP
>
> Hehe, I have found the flv in the browsers cache!
> It only caches the flv when you seek, and because the
> php script also sends a header, the flv from the cache
> is as good as any other flv!
>
> Use
> header("Cache-Control: no-store, no-cache,
> must-revalidate");
> in the php script to avoid the caching.
>
> --- Stefan Richter <stefan-fMeCE+ULXElEfu+5ix1nRw@public.gmane.org> wrote:
>
> ns.play("flvprovider.php?file=clip_yes.flv&position="
> === message truncated ===
>
>
>
>
>
> __________________________________
> Yahoo! Mail - PC Magazine Editors' Choice 2005
> http://mail.yahoo.com
>
> =-----------------------------------------------------------
> Supported by Fig Leaf Software - http://www.figleaf.com
> =-----------------------------------------------------------
>
> To change your subscription options or search the archive:
> http://chattyfig.figleaf.com/mailman/listinfo/flashcomm
=-----------------------------------------------------------
Supported by Fig Leaf Software - http://www.figleaf.com
=-----------------------------------------------------------
To change your subscription options or search the archive:
http://chattyfig.figleaf.com/mailman/listinfo/flashcomm
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